Kentucky Route 80 in the context of "Pikeville Cut-Through"

The Pikeville Cut-Through is a rock cut in Pikeville, Kentucky, United States, completed in 1987, through which passes a four-lane divided highway (Corridor B, numbered as U.S. Route 23 (US 23), US 119, US 460, and KY 80), a railroad line (CSX' Big Sandy Subdivision), and the Levisa Fork of the Big Sandy River. It is one of the largest civil engineering projects in the Western Hemisphere. Nearly 18,000,000 cubic yards (14,000,000 m) of soil and rock were moved while making the Pikeville Cut-Through. It was designed and constructed by the U.S. Army Corps of Engineers.

The Pikeville Cut-Through is 1,300 feet (400 m) wide, 3,700 feet (1.1 km) long, and 523 feet (159 m) deep. The project was completed in 1987 following 14 years of work at a cost of $77.6 million ($215 million in 2024 dollars).